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• problem to find out the string is null or not

  - by Richa Media and services

  in mysql default null value is (NULL) when i try to use it in c# that code not work because it is a string who have a value "(NULL)" how i can check that string is null or not. if i check by string.insnullorempty or ==null it's not worked how can i check this row is null or not in c#

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• CodeIgniter: Storing an image in the database?

  - by thedp

  Hello, I would like to store images in my mySQL database using the CodeIgniter PHP framework. How do I write and read the image? Thank you.

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• System date capturing in to data base

  - by user335103

  i create a registration form in my jsp project.mysql be the database.i want to insert system date automatically in datebase in the registration time.

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• How to sort it!?

  - by user334269

  The following is my DB data, how can I sorting it by sid and prev_sid with php/mysql!? sid prev_sid type 000 197 app_home 197 198 page_teach 198 218 page_teach 199 211 page_step 211 207 link 218 559 page_step 559 199 page_step Result: sid prev_sid type 000 197 app_home 197 198 page_teach 198 218 page_teach 218 559 page_step 559 199 page_step 199 211 page_step 211 207 link 000 197 198 218 559 199 199 211 207

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• How to renumber primary index.

  - by Kamil Mroczek

  I have got a simple MySQL table and primary index (id) is not numbered one by one (1, 31, 35, 100 etc.). I want them to be numbered like (1, 2, 3, 4). Please tell me how to do it. I would also like to point that I am aware of possible consequences of the operation, but I just want to tidy up the table.

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• what is the out put?

  - by user329820

  Hi this is my code but when I run it in mysql it will show an error because of datatype but my friend checked it with sql server and it doesn't show error and also insert the value: 32769 .which of them is correct? CREATE TABLE T1 (A INTEGER NOT NULL); INSERT T1 VALUES (32768.5);

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• Can php query the results from a previous query?

  - by eaolson

  In some languages (ColdFusion comes to mind), you can run a query on the result set from a previous query. Is it possible to do something like that in php (with MySQL as the database)? I sort of want to do: $rs1 = do_query( "SELECT * FROM animals WHERE type = 'fish'" ); $rs2 = do_query( "SELECT * FROM rs1 WHERE name = 'trout'" );

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• News Portals and database heaviness

  - by jasmine

  What is database design solutions for news portals with high trrafic? Could file system as a good solution? mysql > File system Thanks in advance

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• create procedure fails!?

  - by Mark

  Hi, when trying to create a simple procedure in mysql 5.1.47-community it fails everytime i've tried everything! even simple things like this! DELIMITER // CREATE PROCEDURE two () begin SELECT 1+1; end; //

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• Select number of rows in all tables in the database

  - by Alex N.

  I wonder if this is possible with straight SQL on MySQL. I need to do SELECT COUNT(*) FROM on each table in the database and output results in one result set. Is it possible to do with just SQL?

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• What is wrong with this SQL syntax?

  - by Finbarr

  UPDATE files SET filepath = REPLACE(filepath, `sites/somedomain.com/files/`, `sites/someotherdomain.com/files/`); I have a table called files with a field called filepath. MySQL returns this error: Unknown column 'sites/somedomain.com/files/' in 'field list'

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• Database model for storing expressions and their occurrence in text

  - by lisak

  Hey, I'm doing a statistical research application. I need to store words according to 2 initial letters which is 676 combinations and each word has its number of occurrences (minimal, maximal, average) in text. I'm not sure how the model/schema should look like. There will be a lot of checking whether the keyword was already persisted. I appreciate your suggestions. Edit: I'll be using either mysql or postgresql + spring templates

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• Problem in importing the CSV file containing multiple commas in a sigle field

  - by kakaajee

  Hi Experts, I am having an issue with importing a large(60MB) CSV file in MYSQL DB. The problem arises when an address field has multiple comma seperated values e.g. home no, street no, town etc. I tried to use BigDump for it but, the problem did not solved because of a single field containing multiple comma separated values. Any idea, suggestion or solution from experts how to handle it? Please reply, because I am sick of it. Thanks

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• Calculating average (AVG) and grouping by week on large data set takes too long

  - by caioiglesias

  I'm getting average prices by week on 7 million rows, it's taking around 30 seconds to get the job done. This is the simple query: SELECT AVG(price) as price, yearWEEK(FROM_UNIXTIME(timelog)) as week from pricehistory where timelog > $range and product_id = $id GROUP BY week The only week that actually gets data changed and is worth averaging every time is always the last one, so this calculation for the whole period is a waste of resources. I just wanted to know if mysql has a tool to help out on this.

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• Is there anyway to change the database server without stopping the database?

  - by Tattat

  I have a database in data center, which is running MySQL, and I want to change the database from data center to host in my company. At that time, I don't want to stop the data base in the data center, is there anyway to this kind of integeration? Thank you...

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• limiting user actions by months

  - by Ahmet vardar

  hi my users upload photo and all uploads recorded in mysql with the date info. i want to limit uploads by the months. user may just upload 3 pics in a month. what is the best way to do this ? cheers

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• Is SQLlite strong enough to use as wordpress database ?

  - by justjoe

  i'm just curious. so i ask this particular question about SQLite. I haven't use this type of database extensively. but care to explain what is the basic different between SQLite and Mysql ? The reason behind all of this is i just want to know whether it possible to use it to store wordpress data and act as a database ?

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• mysqldump problem with case sensitivity? Win->linux

  - by acidzombie24

  When i dump a table with uppercase letters using mysqldump it comes out as lower case in my dump.sql file. I found a report here in 2006, almost 4 years old http://bugs.mysql.com/bug.php?id=19967 A solution here suggest making linux insensitive. I rather not if possible. Whats the easiest way to copy a win32 db into linux?

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• MySQL: host name universal change.

  - by ctrlShiftBryan

  I am making some updates to a php site which I did not design. I have a local copy of the site. At the top of each page there are settings for the host name for the db connection. Is there someway I can setup a pointer to the remote address. The address is 'mysqlhost' for example and I want that to point to 'mysql.myhost.com'. I tried creating a HOST record for mysqlhost pointing to the IP address it resolves to but that doesn't work. If I put 'mysql.myhost.com' in the connection it works. If I put that IP address it doesn't so that is probably why the HOST record idea doesn't work. Other than creating a local copy of the DB is there a quick way so that I don't have to modify each file in my dev environment and then again when I redeploy?

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• UPLOAD DATA IN DATA BASE

  - by rajson

  HI friends, i wish to store image and resume of user in the data base. i am using mysql data base and php5. i want to know that which field i set means data type.and how i set the range (maximum size) for uploaded data.

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• Is there a way to figure out which web page is associated with which query?

  - by GregoryD

  I'm running a LAMP stack. When I go into phpmyadmin, I can see that there are quite a number of sleeping connections which probably should be closed. Is there a way, using either Apache or MySQL, to determine on which pages those connections are created?

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• Porting from MS Access

  - by lacqui

  I've recently been given a MS Access .mdb database file and asked to make it usable in a Linux system. What I'm looking for is a way to convert the Access database to an open-source database such as MySQL or PostGres. I don't have MS Office, and it's a one-time project for a volunteer organization so I don't want to spend money if it's avoidable. I'm running Vista x64, and have a Linux virtualbox, so something usable in either one will be good.

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• SQL select from last inserted

  - by arik-so

  Hello, in MySQL, I have table. One column has auto-increment. When I insert something mysql_query('INSERT INTO `table` SET `column` = "data";'); Now, what I want is, without further queries, to get the value of the auto-incrementing column, maybe like this: mysql_query('insertion = (INSERT INTO `table` SET `column` = "data"); SELECT `auto_incrementing_column` FROM `table`.insertion'); Please tell me how something like that is done. Thanks in advance!

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• manage user permissions in php

  - by user420528

  i am creating a marks management system using php & mysqlwhere the concerned faculty will be able to login and enter the marks of the students. i can go with a simple table but the problem is there are 288 different subjects for which marks must be entered. So creating a mysql table with so many subjects does not look good for me. please suggest me the best way to manage user permissions so that only the corresponding faculty will be able to enter marks

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• Data pagination with "saved" search

  - by TiuTalk

  I'm creating a page that's a search result... When you're viewing one of the results, at the bottom of the page, I need to insert "Next result" and "Previous result" links, like a pagination... But from [I think] a saved search, right? How you people would do this? Obs.: I'll use CakePHP (PHP) and MySQL

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